Struct H264SpsInfo 

pub struct H264SpsInfo {

    pub profile_idc: u8,
    pub constraint_set_flags: u8,
    pub level_idc: u8,
    pub chroma_format_idc: u8,
    pub separate_colour_plane_flag: bool,
    pub bit_depth_luma: u8,
    pub bit_depth_chroma: u8,
    pub frame_mbs_only: bool,
    pub width: Option<u32>,
    pub height: Option<u32>,
    pub log2_max_frame_num_minus4: Option<u8>,
    pub pic_order_cnt_type: Option<u8>,
    pub log2_max_pic_order_cnt_lsb_minus4: Option<u8>,
    pub delta_pic_order_always_zero_flag: Option<bool>,
    pub qpprime_y_zero_transform_bypass_flag: Option<bool>,
    pub seq_scaling_matrix_present_flag: Option<bool>,
    pub max_num_ref_frames: Option<u8>,
    pub gaps_in_frame_num_value_allowed_flag: Option<bool>,
    pub mb_adaptive_frame_field_flag: Option<bool>,
    pub direct_8x8_inference_flag: Option<bool>,
    pub frame_cropping_flag: Option<bool>,
    pub frame_crop_left_offset: Option<u32>,
    pub frame_crop_right_offset: Option<u32>,
    pub frame_crop_top_offset: Option<u32>,
    pub frame_crop_bottom_offset: Option<u32>,
    pub offset_for_non_ref_pic: Option<i32>,
    pub offset_for_top_to_bottom_field: Option<i32>,
    pub num_ref_frames_in_pic_order_cnt_cycle: Option<u8>,
    pub offset_for_ref_frame: Vec<i32>,
}

Parsed H.264 SPS fields relevant to the pipeline.

Populated by parse_h264_sps which walks the SPS through the frame cropping offsets per ITU-T H.264 §7.3.2.1.1 and applies the display rectangle derivation of §7.4.2.1.1 + Table 6-1 (SubWidthC / SubHeightC) to produce the post-crop displayable width/height.

Width/height are Option<u32> because the full SPS walk can bail on a malformed scaling list or an exotic pic_order_cnt_type branch; profile_idc / chroma_format_idc are always populated on a successful Some(_) return since they live in the SPS prefix before any of the variable-length sections.

Fields

profile_idc: u8

constraint_set_flags: u8

Packed 8-bit constraint_set_flags (Ch) — constraint_set0..5_flag in the high 6 bits, 2 reserved_zero bits. Preserved verbatim for Std struct output.

level_idc: u8

chroma_format_idc: u8

separate_colour_plane_flag: bool

bit_depth_luma: u8

bit_depth_chroma: u8

frame_mbs_only: bool

width: Option<u32>

Post-crop width in luma samples, or None if the parse stopped before reaching the cropping fields.

height: Option<u32>

log2_max_frame_num_minus4: Option<u8>

log2_max_frame_num_minus4 — slice headers carry frame_num as u(log2_max_frame_num_minus4 + 4) bits. None if the dims parse bailed before reaching this field.

pic_order_cnt_type: Option<u8>

0 / 1 / 2 per §7.4.2.1. Controls which POC fields the slice header carries.

log2_max_pic_order_cnt_lsb_minus4: Option<u8>

Valid when pic_order_cnt_type == 0. Bit width of pic_order_cnt_lsb in the slice header: log2_max_pic_order_cnt_lsb_minus4 + 4.

delta_pic_order_always_zero_flag: Option<bool>

Valid when pic_order_cnt_type == 1. Gates the slice header’s delta_pic_order_cnt[0..1] branch.

qpprime_y_zero_transform_bypass_flag: Option<bool>

seq_scaling_matrix_present_flag: Option<bool>

max_num_ref_frames: Option<u8>

gaps_in_frame_num_value_allowed_flag: Option<bool>

mb_adaptive_frame_field_flag: Option<bool>

Only meaningful when !frame_mbs_only.

direct_8x8_inference_flag: Option<bool>

frame_cropping_flag: Option<bool>

frame_crop_left_offset: Option<u32>

frame_crop_right_offset: Option<u32>

frame_crop_top_offset: Option<u32>

frame_crop_bottom_offset: Option<u32>

offset_for_non_ref_pic: Option<i32>

Valid when pic_order_cnt_type == 1.

offset_for_top_to_bottom_field: Option<i32>

num_ref_frames_in_pic_order_cnt_cycle: Option<u8>

offset_for_ref_frame: Vec<i32>

Populated only when pic_order_cnt_type == 1. Length equals num_ref_frames_in_pic_order_cnt_cycle (0..=255). Spec allows up to 256 entries but no real-world stream exercises the full range.

Trait Implementations

impl Clone for H264SpsInfo

fn clone(&self) -> H264SpsInfo

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for H264SpsInfo

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for H264SpsInfo

impl PartialEq for H264SpsInfo

fn eq(&self, other: &H264SpsInfo) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl StructuralPartialEq for H264SpsInfo